包含单选框、多选框、session的应用，页面自己主动跳转，中文乱码的处理，入门级
对于中文乱码的处理，注意几点:注冊页面数据提交方式为post不能忘了写，页面编码方式为gbk,处理提交信息的doRegister.jsp要加
request.setCharacterEncoding("gbk");一定要加!
注冊页面
register.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<html>
<head>
<title>注冊页面</title>
</head>
<body>
<center>
<h3>欢迎注冊该站点</h3>
<form action="doRegister.jsp" method="post">
<table>
<tr>
<td>username</td>
<td><input type="text" name="user"></td>
</tr>
<tr>
<td>password</td>
<td><input type="password" name="pwd">password不得少于6位</td>
</tr>
<tr>
<td>性别</td>
<td><input type="radio" name="sex" value="男">男
<input type="radio" name="sex" value="女">女</td>
</tr>
<tr>
<td>擅长的语言</td>
<td></td>
<td><input type="checkbox" name="checkbox1" value="C">C</td>
<td><input type="checkbox" name="checkbox1" value="Java">Java</td>
<td><input type="checkbox" name="checkbox1" value="C#">C#</td>
<td><input type="checkbox" name="checkbox1" value="Ruby">Ruby</td>
<td><input type="checkbox" name="checkbox1" value="PHP">PHP</td>
</tr>
<tr>
<td><input type="submit" value="注冊"></td>
<td><input type="reset" value="取消"></td>
</tr>
</table>
</form>
</center>
</body>
</html>
处理注冊信息页面
doRegister.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<html>
<head>
<title>处理用户注冊信息</title>
</head>
<body>
<h3>保存用户信息</h3>
<hr>
<%
request.setCharacterEncoding("gbk");
String user=request.getParameter("user");
String pwd=request.getParameter("pwd");
if(user.equals("")||pwd.equals("")){
out.println("username或password不能为空!请又一次注冊");
response.setHeader("refresh", "3;url=register.jsp");
}
else if(pwd.length()<6){
out.println("password不能少于6位!请又一次注冊");
response.setHeader("refresh", "3;url=register.jsp");
}
else{
session.setAttribute("user",user);
session.setAttribute("pwd",pwd);
String xingbie=request.getParameter("sex");
session.setAttribute("sex", xingbie);
String[] str=(String[])request.getParameterValues("checkbox1");
session.setAttribute("zhuanchang", str);
response.sendRedirect("showRegisterInfo.jsp");
}
%>
</body>
</html>
注冊成功，显示信息页面
showRegisterInfo.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<html>
<head>
<title>显示用户注冊信息</title>
</head>
<body>
<h3>恭喜你，注冊成功</h3>
<h3>你的注冊信息为:</h3>
<%
String username=(String)session.getAttribute("user");
out.println("用户名:"+" "+username+"<br>");
String password=(String)session.getAttribute("pwd");
out.println("密码:"+" "+password+"<br>");
String sex=(String)session.getAttribute("sex");
out.println("性别:"+" "+sex+"<br>");
String[] zhuanchang=(String[])session.getAttribute("zhuanchang");
out.print("擅长的语言:");
for(int i=0;i<zhuanchang.length;i++)
out.print(" "+zhuanchang[i]);
%>
</body>
</html>